approximately 80 mines remain in the strait of hormuz's main shipping channel even after the us-iran mou signed june 18. us imports from gulf ports fell 93 percent year-over-year — from 1.5 million to roughly 100,000 metric tonnes between may 2025 and may 2026. the mou itself showed instability within hours: iran placed nuclear negotiations on hold and vance postponed a scheduled swiss trip, suggesting the diplomatic frame is already under strain while the physical hazard persists.